set xtics format "2^{%L}"
set ytics format "e^{%L}"
ln2 = sprintf("2 = e^{%.2f}", log(2))
set ytics add (ln2 2)
set logscale x 2
set logscale y exp(1)
set ylabel "{/=18 log_{e} y}" offset 1,0
set xrange [2**(-2):2**(2)]
set grid 
set term pngcairo enh font "Helvetica,14" size 480,360
set out "loglogformat_exT.png"
plot x t "y = x"